On Fri, May 27, 2016 at 09:39:53AM +0800, Qu Wenruo wrote: > Any comment? > > This patch does not fix the submitted generic/352[1] and generic/353[2] > test cases, but also introduce a much better structure and design for > later backref walk use. > > Instead of a list and do a O(n^3)~O(n^4) iteration for fiemap ioctl on a > reflinked(deduped) file, it's now only O(n)~O(nlogn) for SHARED flag > check to pass generic/352. This is a good improvement, though there's potentially hidden cost in the allocations and maintaining the temporary structures. Do you have actual performance numbers? -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
